/**
 * Software License, Version 1.0
 * 
 * Copyright 2003 The Trustees of Indiana University.  All rights reserved.
 * 
 *
 *Redistribution and use in source and binary forms, with or without 
 *modification, are permitted provided that the following conditions are met:
 *
 *1) All redistributions of source code must retain the above copyright notice,
 * the list of authors in the original source code, this list of conditions and
 * the disclaimer listed in this license;
 *2) All redistributions in binary form must reproduce the above copyright 
 * notice, this list of conditions and the disclaimer listed in this license in
 * the documentation and/or other materials provided with the distribution;
 *3) Any documentation included with all redistributions must include the 
 * following acknowledgement:
 *
 *"This product includes software developed by the Community Grids Lab. For 
 * further information contact the Community Grids Lab at 
 * http://communitygrids.iu.edu/."
 *
 * Alternatively, this acknowledgement may appear in the software itself, and 
 * wherever such third-party acknowledgments normally appear.
 * 
 *4) The name Indiana University or Community Grids Lab or NaradaBrokering, 
 * shall not be used to endorse or promote products derived from this software 
 * without prior written permission from Indiana University.  For written 
 * permission, please contact the Advanced Research and Technology Institute 
 * ("ARTI") at 351 West 10th Street, Indianapolis, Indiana 46202.
 *5) Products derived from this software may not be called NaradaBrokering, 
 * nor may Indiana University or Community Grids Lab or NaradaBrokering appear
 * in their name, without prior written permission of ARTI.
 * 
 *
 * Indiana University provides no reassurances that the source code provided 
 * does not infringe the patent or any other intellectual property rights of 
 * any other entity.  Indiana University disclaims any liability to any 
 * recipient for claims brought by any other entity based on infringement of 
 * intellectual property rights or otherwise.  
 *
 *LICENSEE UNDERSTANDS THAT SOFTWARE IS PROVIDED "AS IS" FOR WHICH NO 
 *WARRANTIES AS TO CAPABILITIES OR ACCURACY ARE MADE. INDIANA UNIVERSITY GIVES
 *NO WARRANTIES AND MAKES NO REPRESENTATION THAT SOFTWARE IS FREE OF 
 *INFRINGEMENT OF THIRD PARTY PATENT, COPYRIGHT, OR OTHER PROPRIETARY RIGHTS. 
 *INDIANA UNIVERSITY MAKES NO WARRANTIES THAT SOFTWARE IS FREE FROM "BUGS", 
 *"VIRUSES", "TROJAN HORSES", "TRAP DOORS", "WORMS", OR OTHER HARMFUL CODE.  
 *LICENSEE ASSUMES THE ENTIRE RISK AS TO THE PERFORMANCE OF SOFTWARE AND/OR 
 *ASSOCIATED MATERIALS, AND TO THE PERFORMANCE AND VALIDITY OF INFORMATION 
 *GENERATED USING SOFTWARE.
 */
package cgl.narada.transport.ptcp.psocket.threads;

import java.io.DataInputStream;
import java.io.InputStream;

import cgl.narada.transport.ptcp.psocket.PTCPInputStream;
import cgl.narada.transport.ptcp.psocket.tools.PTCPParameters;

/**
 * <p>Title: </p>
 * <p>Description: </p>
 * <p>Copyright: Copyright (c) 2004</p>
 * <p>Company: </p>
 * @author not attributable
 * @version 1.0
 */
public class PTCPReceiverWorker
    implements Runnable, PTCPParameters { //extends Thread {

  private DataInputStream din_ = null;
  private PTCPInputStream parent_ = null;
  private String name_ = null;
  private boolean error_ = false;
  private String module_name_ = "PTCPReceiverWorker: ";

  public PTCPReceiverWorker() {
  }

  public PTCPReceiverWorker(PTCPInputStream parent, InputStream is) {
    initialize(parent, is, "-1");
  }

  public PTCPReceiverWorker(PTCPInputStream parent, InputStream is, String name) {
    initialize(parent, is, name);
  }

  private void initialize(PTCPInputStream parent, InputStream is, String name) {
    this.parent_ = parent;
    this.name_ = name;
    if (PTCPReceiverWorker_Debug) {
      System.out.println(module_name_ + this.name_ + " has fired");
    }

    try {
      din_ = new DataInputStream(is);
    }
    catch (Exception ex) {
      ex.printStackTrace();
    }

  }

  public void read() {
    int dataLength = 0;
    int packetNumber = -1;
    long endTime = 0;
    byte[] data = null;

    try {
      packetNumber = din_.readInt();

      if (packetNumber != -1) {
        dataLength = din_.readInt();
        data = new byte[dataLength];
        din_.readFully(data, 0, dataLength);
        endTime = din_.readLong();
        if (PTCPReceiverWorker_Debug) {
          System.out.println(module_name_ + name_ + " has received " +
                             packetNumber + ". packet " + dataLength);
        }

        parent_.buffer_.write(packetNumber, data);
      }
      else {
        error_ = true;
      }
    }
    catch (Exception e) {
      if (PTCPReceiverWorker_Debug) {
        System.out.println(module_name_ + name_ + " ERROR: " + e);
      }
      System.out.println(module_name_ + name_ + ". Stream has End of File (EOF)");
      error_ = true;
    }
  }

  public synchronized void run() {
    while (!parent_.finished() && !error_) {
      read();
    }
    parent_.buffer_.setExit(name_);
    if (PTCPReceiverWorker_Debug) {
      System.out.println(module_name_ + name_ + " is exiting");
    }
  }

}
